diff --git a/src/addition.c b/src/addition.c
index afa0ea4..724dd99 100644
--- a/src/addition.c
+++ b/src/addition.c
@@ -1,12 +1,16 @@
 #include "addition.h"
 #include <stdlib.h>
 
+// full_adder is an implementation of two bit addition with carry
+
 void full_adder (num* sum, num* nextcarry, num number1, num number2, num carry) {
     sum[0] = (number1 % 2) ^ (number2 % 2) ^ (carry % 2);
     
     nextcarry[0] = ((number1 % 2) & (number2 % 2)) | ((number1 % 2) & (carry % 2)) | ((number2 % 2) & (carry % 2));
 }
 
+// addition is an implementation of an 32 bit addition
+
 unsigned int addition(num number1, num number2) {
     unsigned int result = 0;
     num sum[1] = {0};
@@ -24,15 +28,21 @@ unsigned int addition(num number1, num number2) {
     return result;
 }
 
-unsigned int s(unsigned int a) {
-    return a >> 31;
+// reading sign out of an integer (floating number)
+
+unsigned int sign(unsigned int number) {
+    return number >> 31;
 }
 
-unsigned int m(unsigned int a) {
-    unsigned int num = 8388607;
-    return (a & num);
+// reading precision out of an integer (floating number)
+
+unsigned int precision(unsigned int number) {
+    unsigned int precision = 8388607;
+    return (number & precision);
 }
 
-float addition_float(float a, float b) {
+// addition of two floating numbers
+
+float addition_float(float number1, float number2) {
     return 0.0;
 }
\ No newline at end of file
diff --git a/src/addition.h b/src/addition.h
index 66497e0..cf09c60 100644
--- a/src/addition.h
+++ b/src/addition.h
@@ -5,12 +5,12 @@ typedef unsigned int num;
 
 void full_adder (num* sum, num* nextcarry, num number1, num number2, num carry);
 
-unsigned int addition(num a, num b);
+unsigned int addition(num number1, num number2);
 
-unsigned int s(unsigned int a);
+unsigned int sign(unsigned int number);
 
-unsigned int m(unsigned int a);
+unsigned int precision(unsigned int number);
 
-float addition_float(float a, float b);
+float addition_float(float number1, float number2);
 
 #endif // ADDITION_H
diff --git a/test/test_addition.c b/test/test_addition.c
index 0b3058a..2f68711 100644
--- a/test/test_addition.c
+++ b/test/test_addition.c
@@ -143,8 +143,8 @@ void test_addition_signfloatingnumber(void) {
     unsigned int expected[2] = { 0, 1 };
     number[0].floating = 1, number[1].floating = -1;
     
-    result[0] = s(number[0].integer);
-    result[1] = s(number[1].integer);
+    result[0] = sign(number[0].integer);
+    result[1] = sign(number[1].integer);
 
     TEST_ASSERT_EQUAL_UINT(expected[0], result[0]);
     TEST_ASSERT_EQUAL_UINT(expected[1], result[1]);
@@ -155,11 +155,11 @@ void test_addition_precisionfloatingnumber(void) {
     number[0].floating = 0, number[1].floating = -34753168, number[2].floating = 75613594, number[3].floating = -0.00000044568721, number[4].floating = 0.0000004796123;
     unsigned int expected[5] = { ( number[0].integer << 9) >> 9 , ( number[1].integer << 9) >> 9, ( number[2].integer << 9) >> 9, ( number[3].integer << 9) >> 9, ( number[4].integer << 9) >> 9};
 
-    result[0] = m( number[0].integer );
-    result[1] = m( number[1].integer );
-    result[2] = m( number[2].integer );
-    result[3] = m( number[3].integer );
-    result[4] = m( number[4].integer );
+    result[0] = precision( number[0].integer );
+    result[1] = precision( number[1].integer );
+    result[2] = precision( number[2].integer );
+    result[3] = precision( number[3].integer );
+    result[4] = precision( number[4].integer );
 
     TEST_ASSERT_EQUAL_UINT(expected[0], result[0]);
     TEST_ASSERT_EQUAL_UINT(expected[1], result[1]);